失效回复测试(Recovery Testing)，其目标是______。
A) 测试各种资源在超负荷的情况下的运行情况
B) 检测系统可以处理目标内确定的数据容量
C) 度量系统的性能和预先定义的目标有多大差距
D) 验证系统从软件或者硬件失效中恢复的能力
参考答案：D
解析： 失效恢复测试的目标就是验证系统从软件或者硬件失效中恢复的能力。失效回复测试采用各种人为干预的方式使软件出错，造成人为的系统失效，进而检查系统的恢复能力。
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| Mike is a middle school student. He goes to school from Monday to Friday. His home is about 5 miles from school. He usually walks to school. It takes him 50 minutes to walk there. Nancy’s home is a little farther. It’s 20 miles from school. So she often takes the school bus. It takes her 15 minutes to get to school. Bob lives outside the city. It’s a town 30 miles away from his school. He takes the subway. It takes him 8 minutes to get to school by subway. He can have breakfast at home and then leave for the subway station. He studies very hard.
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